FRAME AS 3C8139 - Caterpillar

Table 1
Diagnostic Trouble Codes for Low Coolant Level
J1939 Code Description Information About the Code
111-17 Engine Coolant Level - Low - Least Severe (1) The coolant level sensor and the circuit for the sensor are OK. (1) The coolant level is low.(2)
Factory passwords are required in order to clear the code.
111-1 Engine Coolant Level : Low - Most Severe (3) The coolant level sensor and the circuit for the sensor are OK. (1) The coolant level is low.
The ECM activates this code after a 111-17 code has been active for a few seconds.
(3)
Factory passwords are required in order to clear the code.
111-14 Engine Coolant Level : Special Instruction The coolant level sensor and the circuit for the sensor are OK. (1) The coolant level is low.
The ECM activates this code when the coolant level is low and there are less than six hours on the diagnostic clock.
Factory passwords are not required in order to clear the code.
(1) The 111-17 code may result from faulty wiring if the ECM is programmed to the 2-Pin Switch option.
(2) When the ECM is programmed to 2 Wire Float, the following condition exists. The voltage from a 2-wire float sensor indicates a level that is low.
(3) When the ECM is programmed to 2 Wire Float, the following condition exists. The voltage from a 2-wire float sensor indicates a level that is very low.The system response depends on the engine run time. Refer to Illustrations 1 and 2.
Illustration 1 g01382447
System response to low coolant level for an engine that has been running for more than 30 seconds
Illustration 2 g01382644
System response to low coolant level after the engine has been restarted.
Inspect the cooling system. Refer to Systems Operation/Testing and Adjusting, "Cooling System - Test" for the correct procedure.